JPH0842598A - Clutch release bearing - Google Patents

Abstract

PURPOSE:To obviate the need for fastening of a cover, simplify the assembly work and simplify the shape. CONSTITUTION:In a clutch release bearing wherein a side plate 20, a sleeve flange 42, a bearing 60, and a wavy washer 80 are arranged in a forward direction, in the order, and integrally held by a cover 10, the cover 10 is molded by using resin and a plurality of engaging parts 18 snap-engaged with the side plate 20 are integrally provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a clutch release bearing used in a clutch for transmitting the rotation of an automobile engine to a drive system and for disconnecting the same.

[0002]

2. Description of the Related Art Conventional clutch release bearings are
As shown in FIG. 5, the inner flange (1a) of the cover (1)
And a side plate (2), a sleeve flange (4a), a bearing (6) and a wave washer (8) are sequentially arranged in the axial direction and integrally held by a cover (1).

The outer ring (6a) of the bearing (6), together with the wave washer (8) and the sleeve flange (4a), is swaged to the side plate (2) by the cover (1).

A diaphragm contact portion (6c) for contacting a diaphragm spring (not shown) is integrally formed on the inner ring (6b) of the bearing (6), and is formed by a release fork (not shown). When the clutch release bearing is moved in the axial direction by the force applied to the side plate (2) and the clutch release bearing is pressed against the diaphragm spring, the bearing (6) is elastically supported by the wave washer (8). , The center of rotation of the bearing (6) follows and coincides with the center of rotation of the diaphragm spring (self-aligning function).

[0005]

In the conventional clutch release bearing, a cover (1b) provided on the edge of a cover (1) made of mild steel is bent and crimped on the outer periphery of the side plate (2). The sleeve flange (4a), the outer ring (6a) of the bearing (6) and the wave washer (8) are integrally sandwiched between the inner flange (1a) of (1) and the side plate (2).

A notch (2a) is provided in advance in a portion of the side plate (2) where the edge of the cover (1) is to be crimped, and the claw portion of the cover (1) is provided in the notch (2a) portion. By swaging (1b), the rotation is stopped at the same time. Similarly, the protrusion (4b) of the sleeve (4) and the notch (2b) of the side plate (2) are fitted to each other to prevent the sleeve (4) from rotating.

The bearing (6) is provided by interposing the wave washer (8).
Can move radially. Since the rotational frictional force of the bearing (6) is transmitted to the cover (1) via the wave washer (8), it is necessary to firmly crimp the cover (1). For that purpose, the cover (1) is bent one step larger than the outer diameter portion, and the side plate (2) is arranged, and then the claw portion (1b) is swaged. Therefore,
The outer diameter of the entire clutch release bearing increases,
Further, the side plate (2) also has to be complicated in shape because it is necessary to provide a rotation stopper. Further, since the cover (1) is made of mild steel and needs to be firmly caulked to have strength, it is necessary to caulk the claw portion (1b) in several steps rather than in one shot.

An object of the present invention is to simplify the assembly work and the shape by eliminating the need for caulking the cover.

[0009]

To achieve the above object, in the clutch release bearing of the present invention, the side plate, the sleeve flange, the bearing and the wave washer are sequentially arranged in the axial direction and integrally held by the cover. In a clutch release bearing, a cover is molded from resin and a plurality of engaging portions for snap-engaging with a side plate are integrally provided.

The cover has a cylindrical main body, an inner flange portion located at one end side of the main body, a plurality of claw portions extending axially from the other end side of the main body, and a downward projection from the tip of the claw portion. And a window hole is formed in the inner flange at a circumferential position corresponding to the claw portion. A glass fiber reinforced resin is suitable as the resin forming the cover.

[0011]

By forming the cover with resin and providing the engaging portion that snap-engages with the side plate, the clutch release bearing can be assembled with one touch by simply engaging the engaging portion of the cover with the side plate. Therefore, it is not necessary to crimp the cover to the side plate as in the conventional case.

That is, as described above, the conventional cover is crimped to the side plate, but this crimping work is performed in several steps so as to prevent cracks from occurring, and for that reason, many However, according to the present invention, it is unnecessary to crimp the cover, and the assembling becomes very easy.

The cover has a cylindrical main body, an inner flange portion located at one end side of the main body, a plurality of claw portions extending axially from the other end side of the main body, and an inner diameter from the tip of the claw portion. When the cover is molded, the mold is pulled out in the axial direction when the cover is molded, because the inner flange and the engaging part both extend toward the inner diameter side of the main body. Need to be able to. The window hole formed at the circumferential position corresponding to the claw portion of the inner flange portion allows the die to be removed. That is, the mold for molding the cover is divided into two molds that can be separated in the axial direction, and one mold for molding the outer end surface of the inner flange portion is extended in the axial direction from the window hole of the inner flange portion. And a portion for molding the engaging portion is provided. The inner end surface of the inner flange portion, the inner diameter surface of the main body portion, and the claw portion are formed by the other mold.

When the cover is made of glass fiber reinforced resin, appropriate strength can be obtained, which contributes to improvement of durability of the clutch release bearing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT In the embodiment shown in FIG. 1, a clutch release bearing comprises a side plate (20), a sleeve (40), a bearing (60), a wave washer (80) and a cover (10).

The bearing (60) has an outer ring (62) and an inner ring (6).
4), rolling elements (balls) (63) are interposed between them, and the diaphragm contact portion (6) is provided at one end of the inner ring (64).
6) is integrally formed, and when the side plate (20) is pushed by a release fork (not shown), the entire clutch release bearing moves axially and the diaphragm spring is pushed by the diaphragm contact portion (66). Be done.
During such axial movement, the sleeve (40) slides along the main shaft (not shown).

The outer ring (62) of the bearing (60) and the cover (1)
Wave washer (80) between the inner flange (14) of (0)
Since the bearing (60) is elastically supported by the wave washer (80), when the clutch release bearing is pressed against the diaphragm spring, the center of rotation of the bearing (6) is aligned with the center of rotation of the diaphragm spring. Follow and match. Due to such self-aligning action, abnormal wear or abnormal noise does not occur at the contact portion with the diaphragm.

The cover (10) is made of a resin such as glass fiber reinforced resin, and has a cylindrical main body (12) and an inner flange portion (14) located at one end of the main body (12).
And a plurality of claws (16) extending in the axial direction from the other end of the body (12), and an engaging part (18) formed at the tip of the claw (16). Between the inner flange portion (14) of the cover (10) and the engagement portion (18), a side plate (20),
Sleeve flange (42), bearing (60) outer ring (6
2) and the wave washer (80) are held together.

The claw portions (16) of the cover (10) may be provided at two places as shown in the drawing, or may be provided at three or more places at equal intervals in the circumferential direction. As shown in FIG. 2, each claw portion (16) is provided with a recess (17) at its base end portion to impart elasticity in the radial direction. As a result, the pawl portion (16) can be easily deformed in the radial direction, so that when the clutch release bearing is assembled, the bearing (60), the sleeve flange (42), and the side plate (20) are covered. When it is put inside, the claw portion (16) elastically expands to allow these outer diameters to pass therethrough, and its elastic restoring force causes the engaging portion (18) to move the engaging portion (18).
Snap to 0). Thus, when the wave washer (80), the bearing (60), the sleeve flange (42), and the side plate (20) are incorporated into the cover (10),
The reaction force of the wave washer (80) causes side plates (20) and bearings (6).
0), the sleeve flange (42) is pressed against the engaging portion (18) of the claw portion (16) and elastically held.

The inner flange portion (14) and the engaging portion (1
Since both 8) and 8) extend to the inner diameter side of the main body portion (12), it is necessary to allow the mold to be axially removed when the cover (10) is molded. Therefore, the mold for molding the cover (10) is made into two split molds that can be separated in the axial direction, and a window hole (which penetrates the inner flange portion (14) is provided at a circumferential position corresponding to the claw portion (16). 15) is opened, and one mold for molding the outer end surface of the inner flange portion (14) is provided with a portion for axially extending from the window hole (15) to form the engaging portion (18). . The inner end surface of the inner flange portion (14), the inner diameter surface of the main body portion (12), and the claw portion (16) are formed by the other mold.

As shown in FIG. 3, the side plate (20) has a hole (22) through which the sleeve (40) penetrates in the center thereof, and ears (24) extending in the axial direction at two locations on the outer circumference. ) Is provided, it is a substantially annular component. As is clear from comparing FIGS. 3 and 5, the shape of the side plate (20) is very simple as compared with the conventional one. This covers the cover (10) with the side plate (2
It was realized by eliminating the crimping to 0). The side plate (20) is a release fork (not shown).
It is pushed to the diaphragm spring side by the above, and vice versa, it is pushed to the release fork side by the restoring force of the diaphragm spring.Since it always makes direct sliding contact with the release fork, surface hardening treatment such as carburizing and quenching is usually performed. To improve wear resistance.

Since rotational frictional force acts on the sleeve (40) from the bearing (60), it is necessary to prevent rotation. Therefore, as shown in FIG. 4, several protrusions (44) are provided on the surface of the sleeve flange (42) in contact with the side plate (20). The protrusion (44) and the ear (2) of the side plate (20).
4) and (4) are fitted to each other (FIG. 1 (b)) to form a rotation preventing means. The drawing has two rotation stopping means (24, 44)
Is illustrated as an example. Since the ears (24) of the side plate (20) are supported by the release forks,
The rotational frictional force from the bearing (60) stops here.

[0023]

As described above, according to the present invention, the cover is formed of resin, and the engaging portion for snap-engaging with the side plate is integrally provided, so that the engaging portion of the cover snaps to the side plate. The assembly of the clutch release bearing is completed with one touch just by combining them. Therefore, according to the present invention, it is possible to provide a clutch release bearing which is very simple to assemble because the cover is not required to be crimped, and the shapes of the cover itself and the side plates are very simple and which can be easily manufactured. it can.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a clutch release bearing (a).
And (b) of an end view.

FIG. 2 is a perspective view (a) of a main part and a plan view (b) of the main part of the cover.

FIG. 3 is a front view (a) and a side view (b) of a side plate.

FIG. 4 is a perspective view of a sleeve.

FIG. 5 is a vertical sectional view (a) and an end view (b) of a conventional clutch release bearing.

[Explanation of reference numerals] 10 cover 12 main body portion 14 inner flange portion 15 window hole 17 slime 16 claw portion 18 engaging portion 20 side plate 24 ear portion 40 sleeve 42 sleeve flange 44 protrusion portion 60 bearing 62 outer ring 63 ball 64 inner ring 66 diaphragm contact Part 80 Wave washer

Claims (3)

[Claims] 1. In a clutch release bearing in which a side plate, a sleeve flange, a bearing and a wave washer are sequentially arranged in the axial direction and integrally held by a cover, the cover is molded from resin and snap-engages with the side plate. The clutch release bearing is characterized in that a plurality of engaging portions of the above are integrally provided. 2. A cover has a cylindrical main body, an inner flange portion located at one end side of the main body, a plurality of claw portions axially extending from the other end side of the main body, and a downward direction from the tip of the claw portion. The window hole is formed at a circumferential position corresponding to the claw portion of the inner flange.
Clutch release bearing. 3. The clutch release bearing according to claim 1, wherein the resin forming the cover is a glass fiber reinforced resin.